/* ssl/s2_clnt.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

/* ====================================================================

 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer. 

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include "ssl_locl.h"

#ifndef OPENSSL_NO_SSL2

#include <stdio.h>

#include <openssl/rand.h>

#include <openssl/buffer.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libssl_wsd.h"

#endif

#ifdef EMULATOR

	GET_STATIC_VAR_FROM_TLS(SSLv2_client_method_data,s2_clnt,SSL_METHOD)

	#define SSLv2_client_method_data (*GET_WSD_VAR_NAME(SSLv2_client_method_data,s2_clnt,s)())

#endif

static SSL_METHOD *ssl2_get_client_method(int ver);

static int get_server_finished(SSL *s);

static int get_server_verify(SSL *s);

static int get_server_hello(SSL *s);

static int client_hello(SSL *s); 

static int client_master_key(SSL *s);

static int client_finished(SSL *s);

static int client_certificate(SSL *s);

static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,

	unsigned char *to,int padding);

#define BREAK	break

static SSL_METHOD *ssl2_get_client_method(int ver)

	{

	if (ver == SSL2_VERSION)

		return(SSLv2_client_method());

	else

		return(NULL);

	}

EXPORT_C IMPLEMENT_ssl2_meth_func(SSLv2_client_method,

			ssl_undefined_function,

			ssl2_connect,

			ssl2_get_client_method)

int ssl2_connect(SSL *s)

	{

	unsigned long l=(unsigned long)time(NULL);

	BUF_MEM *buf=NULL;

	int ret= -1;

	void (*cb)(const SSL *ssl,int type,int val)=NULL;

	int new_state,state;

	RAND_add(&l,sizeof(l),0);

	ERR_clear_error();

	clear_sys_error();

	if (s->info_callback != NULL)

		cb=s->info_callback;

	else if (s->ctx->info_callback != NULL)

		cb=s->ctx->info_callback;

	/* init things to blank */

	s->in_handshake++;

	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);

	for (;;)

		{

		state=s->state;

		switch (s->state)

			{

		case SSL_ST_BEFORE:

		case SSL_ST_CONNECT:

		case SSL_ST_BEFORE|SSL_ST_CONNECT:

		case SSL_ST_OK|SSL_ST_CONNECT:

			s->server=0;

			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

			s->version=SSL2_VERSION;

			s->type=SSL_ST_CONNECT;

			buf=s->init_buf;

			if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))

				{

				ret= -1;

				goto end;

				}

			if (!BUF_MEM_grow(buf,

				SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))

				{

				if (buf == s->init_buf)

					buf=NULL;

				ret= -1;

				goto end;

				}

			s->init_buf=buf;

			buf=NULL;

			s->init_num=0;

			s->state=SSL2_ST_SEND_CLIENT_HELLO_A;

			s->ctx->stats.sess_connect++;

			s->handshake_func=ssl2_connect;

			BREAK;

		case SSL2_ST_SEND_CLIENT_HELLO_A:

		case SSL2_ST_SEND_CLIENT_HELLO_B:

			s->shutdown=0;

			ret=client_hello(s);

			if (ret <= 0) goto end;

			s->init_num=0;

			s->state=SSL2_ST_GET_SERVER_HELLO_A;

			BREAK;

		case SSL2_ST_GET_SERVER_HELLO_A:

		case SSL2_ST_GET_SERVER_HELLO_B:

			ret=get_server_hello(s);

			if (ret <= 0) goto end;

			s->init_num=0;

			if (!s->hit) /* new session */

				{

				s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;

				BREAK; 

				}

			else

				{

				s->state=SSL2_ST_CLIENT_START_ENCRYPTION;

				break;

				}

		case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:

		case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:

			ret=client_master_key(s);

			if (ret <= 0) goto end;

			s->init_num=0;

			s->state=SSL2_ST_CLIENT_START_ENCRYPTION;

			break;

		case SSL2_ST_CLIENT_START_ENCRYPTION:

			/* Ok, we now have all the stuff needed to

			 * start encrypting, so lets fire it up :-) */

			if (!ssl2_enc_init(s,1))

				{

				ret= -1;

				goto end;

				}

			s->s2->clear_text=0;

			s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;

			break;

		case SSL2_ST_SEND_CLIENT_FINISHED_A:

		case SSL2_ST_SEND_CLIENT_FINISHED_B:

			ret=client_finished(s);

			if (ret <= 0) goto end;

			s->init_num=0;

			s->state=SSL2_ST_GET_SERVER_VERIFY_A;

			break;

		case SSL2_ST_GET_SERVER_VERIFY_A:

		case SSL2_ST_GET_SERVER_VERIFY_B:

			ret=get_server_verify(s);

			if (ret <= 0) goto end;

			s->init_num=0;

			s->state=SSL2_ST_GET_SERVER_FINISHED_A;

			break;

		case SSL2_ST_GET_SERVER_FINISHED_A:

		case SSL2_ST_GET_SERVER_FINISHED_B:

			ret=get_server_finished(s);

			if (ret <= 0) goto end;

			break;

		case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:

		case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:

		case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:

		case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:

		case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:

			ret=client_certificate(s);

			if (ret <= 0) goto end;

			s->init_num=0;

			s->state=SSL2_ST_GET_SERVER_FINISHED_A;

			break;

		case SSL_ST_OK:

			if (s->init_buf != NULL)

				{

				BUF_MEM_free(s->init_buf);

				s->init_buf=NULL;

				}

			s->init_num=0;

		/*	ERR_clear_error();*/

			/* If we want to cache session-ids in the client

			 * and we successfully add the session-id to the

			 * cache, and there is a callback, then pass it out.

			 * 26/11/96 - eay - only add if not a re-used session.

			 */

			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

			if (s->hit) s->ctx->stats.sess_hit++;

			ret=1;

			/* s->server=0; */

			s->ctx->stats.sess_connect_good++;

			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);

			goto end;

			/* break; */

		default:

			SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);

			return(-1);

			/* break; */

			}

		if ((cb != NULL) && (s->state != state))

			{

			new_state=s->state;

			s->state=state;

			cb(s,SSL_CB_CONNECT_LOOP,1);

			s->state=new_state;

			}

		}

end:

	s->in_handshake--;

	if (buf != NULL)

		BUF_MEM_free(buf);

	if (cb != NULL) 

		cb(s,SSL_CB_CONNECT_EXIT,ret);

	return(ret);

	}

static int get_server_hello(SSL *s)

	{

	unsigned char *buf;

	unsigned char *p;

	int i,j;

	unsigned long len;

	STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;

	buf=(unsigned char *)s->init_buf->data;

	p=buf;

	if (s->state == SSL2_ST_GET_SERVER_HELLO_A)

		{

		i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);

		if (i < (11-s->init_num)) 

			return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));

		s->init_num = 11;

		if (*(p++) != SSL2_MT_SERVER_HELLO)

			{

			if (p[-1] != SSL2_MT_ERROR)

				{

				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

				SSLerr(SSL_F_GET_SERVER_HELLO,

					SSL_R_READ_WRONG_PACKET_TYPE);

				}

			else

				SSLerr(SSL_F_GET_SERVER_HELLO,

					SSL_R_PEER_ERROR);

			return(-1);

			}

#ifdef __APPLE_CC__

		/* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug

		 * workaround. <appro@fy.chalmers.se> */

		s->hit=(i=*(p++))?1:0;

#else

		s->hit=(*(p++))?1:0;

#endif

		s->s2->tmp.cert_type= *(p++);

		n2s(p,i);

		if (i < s->version) s->version=i;

		n2s(p,i); s->s2->tmp.cert_length=i;

		n2s(p,i); s->s2->tmp.csl=i;

		n2s(p,i); s->s2->tmp.conn_id_length=i;

		s->state=SSL2_ST_GET_SERVER_HELLO_B;

		}

	/* SSL2_ST_GET_SERVER_HELLO_B */

	len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;

	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)

		{

		SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);

		return -1;

		}

	j = (int)len - s->init_num;

	i = ssl2_read(s,(char *)&(buf[s->init_num]),j);

	if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));

	if (s->msg_callback)

		s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */

	/* things are looking good */

	p = buf + 11;

	if (s->hit)

		{

		if (s->s2->tmp.cert_length != 0) 

			{

			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);

			return(-1);

			}

		if (s->s2->tmp.cert_type != 0)

			{

			if (!(s->options &

				SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))

				{

				SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);

				return(-1);

				}

			}

		if (s->s2->tmp.csl != 0)

			{

			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);

			return(-1);

			}

		}

	else

		{

#ifdef undef

		/* very bad */

		memset(s->session->session_id,0,

			SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);

		s->session->session_id_length=0;

		*/

#endif

		/* we need to do this in case we were trying to reuse a 

		 * client session but others are already reusing it.

		 * If this was a new 'blank' session ID, the session-id

		 * length will still be 0 */

		if (s->session->session_id_length > 0)

			{

			if (!ssl_get_new_session(s,0))

				{

				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

				return(-1);

				}

			}

		if (ssl2_set_certificate(s,s->s2->tmp.cert_type,

			s->s2->tmp.cert_length,p) <= 0)

			{

			ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);

			return(-1);

			}

		p+=s->s2->tmp.cert_length;

		if (s->s2->tmp.csl == 0)

			{

			ssl2_return_error(s,SSL2_PE_NO_CIPHER);

			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);

			return(-1);

			}

		/* We have just received a list of ciphers back from the

		 * server.  We need to get the ones that match, then select

		 * the one we want the most :-). */

		/* load the ciphers */

		sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,

					    &s->session->ciphers);

		p+=s->s2->tmp.csl;

		if (sk == NULL)

			{

			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

			SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);

			return(-1);

			}

		(void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);

		/* get the array of ciphers we will accept */

		cl=SSL_get_ciphers(s);

		(void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);

		/*

		 * If server preference flag set, choose the first

		 * (highest priority) cipher the server sends, otherwise

		 * client preference has priority.

		 */

		if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)

		    {

		    prio = sk;

		    allow = cl;

		    }

		else

		    {

		    prio = cl;

		    allow = sk;

		    }

		/* In theory we could have ciphers sent back that we

		 * don't want to use but that does not matter since we

		 * will check against the list we originally sent and

		 * for performance reasons we should not bother to match

		 * the two lists up just to check. */

		for (i=0; i<sk_SSL_CIPHER_num(prio); i++)

			{

			if (sk_SSL_CIPHER_find(allow,

					     sk_SSL_CIPHER_value(prio,i)) >= 0)

				break;

			}

		if (i >= sk_SSL_CIPHER_num(prio))

			{

			ssl2_return_error(s,SSL2_PE_NO_CIPHER);

			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);

			return(-1);

			}

		s->session->cipher=sk_SSL_CIPHER_value(prio,i);

		if (s->session->peer != NULL) /* can't happen*/

			{

			ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);